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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include <qffmpegclock_p.h>
#include <qloggingcategory.h>
static Q_LOGGING_CATEGORY(qLcClock, "qt.multimedia.ffmpeg.clock")
QT_BEGIN_NAMESPACE
static bool compareClocks(const QFFmpeg::Clock *a, const QFFmpeg::Clock *b)
{
if (!b)
return false;
if (!a)
return true;
return a->type() < b->type();
}
QFFmpeg::Clock::Clock(ClockController *controller)
: controller(controller)
{
Q_ASSERT(controller);
controller->addClock(this);
}
QFFmpeg::Clock::~Clock()
{
if (controller)
controller->removeClock(this);
}
qint64 QFFmpeg::Clock::currentTime() const
{
return controller ? controller->currentTime() : 0;
}
void QFFmpeg::Clock::syncTo(qint64 time)
{
qCDebug(qLcClock) << "syncTo" << time << isMaster();
}
void QFFmpeg::Clock::setPlaybackRate(float rate, qint64 currentTime)
{
qCDebug(qLcClock) << "Clock::setPlaybackRate" << rate;
Q_UNUSED(rate)
Q_UNUSED(currentTime)
}
void QFFmpeg::Clock::setPaused(bool paused)
{
qCDebug(qLcClock) << "Clock::setPaused" << paused;
Q_UNUSED(paused)
}
qint64 QFFmpeg::Clock::timeUpdated(qint64 currentTime)
{
if (controller)
return controller->timeUpdated(this, currentTime);
return currentTime;
}
qint64 QFFmpeg::Clock::usecsTo(qint64 currentTime, qint64 displayTime)
{
if (!controller || controller->m_isPaused)
return -1;
const qint64 t = qRound64((displayTime - currentTime) / playbackRate());
return t < 0 ? 0 : t;
}
QFFmpeg::Clock::Type QFFmpeg::Clock::type() const
{
return SystemClock;
}
QFFmpeg::ClockController::~ClockController()
{
for (auto *p : std::as_const(m_clocks))
p->setController(nullptr);
}
qint64 QFFmpeg::ClockController::timeUpdated(Clock *clock, qint64 time)
{
QMutexLocker l(&m_mutex);
if (!isMaster(clock)) {
// If the clock isn't the master clock, simply return the current time
// so we can make adjustments as needed
return currentTimeNoLock();
}
// if the clock is the master, adjust our base timing
m_baseTime = time;
m_elapsedTimer.restart();
return time;
}
void QFFmpeg::ClockController::addClock(Clock *clock)
{
qCDebug(qLcClock) << "addClock" << clock;
Q_ASSERT(clock != nullptr);
if (m_clocks.contains(clock))
return;
m_clocks.append(clock);
m_master = std::max(m_master.loadAcquire(), clock, compareClocks);
clock->syncTo(currentTime());
clock->setPaused(m_isPaused);
}
void QFFmpeg::ClockController::removeClock(Clock *clock)
{
qCDebug(qLcClock) << "removeClock" << clock;
m_clocks.removeAll(clock);
if (m_master == clock) {
// find a new master clock
m_master = m_clocks.empty()
? nullptr
: *std::max_element(m_clocks.begin(), m_clocks.end(), compareClocks);
}
}
bool QFFmpeg::ClockController::isMaster(const Clock *clock) const
{
return m_master.loadAcquire() == clock;
}
qint64 QFFmpeg::ClockController::currentTimeNoLock() const
{
return m_isPaused ? m_baseTime : m_baseTime + m_elapsedTimer.elapsed() / m_playbackRate;
}
qint64 QFFmpeg::ClockController::currentTime() const
{
QMutexLocker l(&m_mutex);
return currentTimeNoLock();
}
void QFFmpeg::ClockController::syncTo(qint64 usecs)
{
{
QMutexLocker l(&m_mutex);
qCDebug(qLcClock) << "syncTo" << usecs;
m_baseTime = usecs;
m_seekTime = usecs;
m_elapsedTimer.restart();
}
for (auto *p : std::as_const(m_clocks))
p->syncTo(usecs);
}
void QFFmpeg::ClockController::setPlaybackRate(float rate)
{
qint64 baseTime = 0;
{
qCDebug(qLcClock) << "setPlaybackRate" << rate;
QMutexLocker l(&m_mutex);
m_baseTime = baseTime = currentTimeNoLock();
m_elapsedTimer.restart();
m_playbackRate = rate;
}
for (auto *p : std::as_const(m_clocks))
p->setPlaybackRate(rate, baseTime);
}
void QFFmpeg::ClockController::setPaused(bool paused)
{
{
QMutexLocker l(&m_mutex);
if (m_isPaused == paused)
return;
qCDebug(qLcClock) << "setPaused" << paused;
m_isPaused = paused;
if (m_isPaused) {
m_baseTime = currentTimeNoLock();
m_seekTime = m_baseTime;
} else {
m_elapsedTimer.restart();
}
}
for (auto *p : std::as_const(m_clocks))
p->setPaused(paused);
}
QT_END_NAMESPACE
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